Sectorization based pilot reuse for improving net spectral efficiency in the multicell massive MIMO system

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• 作者：Jiahui Li ; Limin Xiao ; Xibin Xu ; Shidong Zhou
• 关键词：massive MIMO ; multicell ; net SE ; pilot reuse ; sectorization ; UCA ; 022307 ; 大规模MIMO ; 多小区
净频谱效率 ; 导频重用 ; 扇区化 均匀圆形阵列
• 刊名：SCIENCE CHINA Information Sciences
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：59
• 期：2
• 页码：1-15
• 全文大小：1,522 KB
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• 作者单位：Jiahui Li (1) (2) (3)
  Limin Xiao (1) (2) (3)
  Xibin Xu (1) (2) (3)
  Shidong Zhou (1) (2) (3)
  
  1. State Key Laboratory on Microwave and Digital Communications, Beijing, 100084, China
  2. Tsinghua National Laboratory for Information Science and Technology, Beijing, 100084, China
  3. Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
  
• 刊物类别：Computer Science
• 刊物主题：Chinese Library of Science
  Information Systems and Communication Service
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1919

文摘

A sectorization method using the uniform circular array (UCA) is proposed to improve the net spectral efficiency (SE) of the multicell massive MIMO system, which is an important index for evaluating the performance of a communication system. We derive the ergodic achievable uplink net SE per cell of a general sectorized system and obtain its deterministic approximation based on the large random matrix theory. Different weight matrices are considered for the sectorized system and the one with the best performance is utilized for further analysis. The consistency of the deterministic approximation with the result of Monte-Carlo simulation is proved at the same time. At last, numerical results indicate that the net SE per cell can be greatly improved compared to the conventional multicell massive MIMO system, which validates the effectiveness of the sectorization method. Moreover, comparisons with other pilot reuse methods are also made in this paper. Keywords massive MIMO multicell net SE pilot reuse sectorization UCA